Replaced the term "platform" with "board" or "SoC" depending
on context as per, ZEP-534.
Change-Id: I14c13d4eed429fe6e41e2221d6ff6afe97e942eb
Signed-off-by: Evan Couzens <evanx.couzens@intel.com>
Config options KERNEL_EVENT_{INTERRUPT, CONTEXT, SLEEP} don't exist
any more, removed.
Move to use :option:`CONFIG_XYZ` vs :option:`XYZ` to generate propert
links and avoid warnings about unexistant targets.
Change-Id: Ibafa155f474a05329a8cac7bff5c55800d9f31a4
Signed-off-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
By default, kernel event logger is using the system timer. But on
some platforms where the timer driver maintains the system timer
cycle accumulator in software, such as ones using the LOAPIC timer,
the system timer behavior leads to timestamp errors. For example,
the timer interrupt is logged with a wrong timestamp since the HW
timer value has been reset (periodic mode) but accumulated value not
updated yet (done later in the ISR).
This patch is adding the possibility to register a timer callback
function that will be used by the kernel event logger. For example,
on Quark SE, this allows using RTC or AON counter which accuracy is
sufficient and behavior more straight forward compared to system
timer.
Change-Id: I754c7557350ef29fc10701e62a35a5425e035f11
Signed-off-by: Fabrice Olivero <fabrice.olivero@intel.com>
Added CONFIG_KERNEL_EVENT_PROFILER_DYNAMIC flag for enabling that
capability. When set, nothing will be logged by default
Change-Id: I03552483e5a6bfd9e2505eda56908f0d0ae98618
Signed-off-by: Fabrice Olivero <fabrice.olivero@intel.com>
OS tick period (usually 10 ms) is not sufficiently precise for task
execution analysis (like processing CPU load per context)
With that modification, the timestamp used by the kernel event logger
is 32-bit LSB of platform HW timer (for example Lakemont APIC timer
for Quark SE).
This timer period is very small and leads to timestamp wraparound
happening quite often (e.g. every 134s for Quark SE).
This wraparound must be considered when analyzing kernel event logger
data and care must be taken when tickless idle is enabled and sleep
duration can exceed maximum HW timer value.
Change-Id: Idc545da8f828a7357a69d83ff25c9afd09dab3c4
Signed-off-by: Fabrice Olivero <fabrice.olivero@intel.com>
The path to the sample applications is a mis-match of previous and the
current values. Correcting it to represent the new value.
Change-Id: I54ffe823335b95f1076b1346d149b359b4f2e7bd
Signed-off-by: Dan Kalowsky <daniel.kalowsky@intel.com>
Add the kernel event logger documentation where the user can find
how to use this mechanism and which event logging points are
available currently.
Change-Id: I6d86c7b79c6b4a56a9e3514b6c4933a35e0c782f
Signed-off-by: Yonattan Louise <yonattan.a.louise.mendoza@intel.com>
